A collateral mortgage registers a charge for a maximum amount that can secure multiple loans, while a conventional mortgage registers a charge for the specific loan amount. The difference matters when switching lenders or refinancing because it affects discharge, registration, and legal costs.
A collateral mortgage and a conventional mortgage are both secured against your home, but they use different charge structures. In simple terms, a conventional charge secures the specific loan you signed for, while a collateral charge secures a maximum amount that can cover that loan plus future borrowing. That difference becomes important when you switch lenders, refinance, or try to add a home equity line of credit.
Most Canadian mortgages are either standard charges (often called conventional charges) or collateral charges. The label on your mortgage documents affects what happens at renewal and what you can do without registering a new charge. The Financial Consumer Agency of Canada outlines mortgage rights and disclosure rules, including information lenders must provide about the cost of borrowing and the type of charge. The Canada Mortgage and Housing Corporation also explains mortgage loan insurance and homebuying basics that can interact with your charge structure. The Office of the Superintendent of Financial Institutions sets capital and lending expectations for federally regulated lenders, which influence how they register mortgages.
| Feature | Conventional (standard) charge | Collateral charge |
|---|---|---|
| Amount registered | The exact loan amount, plus permitted adjustments | A maximum amount, often up to the property's value or more |
| Future borrowing | Usually requires a new mortgage or refinance to add funds | May allow readvances or additional secured credit without a new registration |
| Switching lenders | Often assigned or transferred at renewal with lower legal work | Usually must be discharged and replaced with a new charge |
| Typical use | Straight mortgage with no bundled credit | Mortgage plus HELOC or readvanceable product |
| Disclosure | Lender must disclose charge type and terms | Lender must disclose that the charge may secure other debts |
What a conventional mortgage charge actually is
A conventional charge, sometimes called a standard charge, is registered against the property's title for the amount you borrow. If you borrow $400,000, the charge is typically for $400,000, though lenders may register a slightly higher amount to cover accrued interest, taxes, or enforcement costs. The charge is tied to that specific mortgage contract and usually does not secure unrelated debts. If you want to borrow more later, you generally refinance the mortgage and either amend the existing charge or register a new one. When you switch lenders at maturity, the new lender can often take an assignment of the existing charge or register a new charge. Some lenders offer no-fee switches for conventional charges, but the details depend on the lender and the province. This structure keeps the registered amount close to the actual debt, which can make the borrower's exposure easier to see.
What a collateral mortgage charge does differently
A collateral mortgage registers a charge for a maximum principal amount, which can be higher than the loan you receive. For example, if you borrow $400,000, the lender might register a collateral charge for $400,000 or for a higher figure such as $500,000 or more, depending on the lender's policy and provincial land title rules. The charge secures the specific mortgage plus any other products you have with that lender, such as a home equity line of credit, a credit card, or an overdraft. Because the charge secures a maximum amount, the lender can readvance funds later without discharging and re-registering the mortgage, as long as you stay within the registered amount and meet the lender's conditions. This is why collateral charges are often paired with readvanceable mortgages and HELOCs. However, the borrower may not always realise that the charge secures other debts. Canadian disclosure rules require lenders to tell you if your mortgage is a collateral charge and what it may secure. The Financial Consumer Agency of Canada has information on borrowing costs and disclosure that can help you ask the right questions.
Why the charge structure matters when switching lenders
Switching from a collateral mortgage to a conventional mortgage, or the reverse, can trigger costs and delay. With a collateral charge, the new lender typically must discharge the old charge and register a new one. That involves legal fees, discharge fees, and possibly a new appraisal. With a conventional charge, some lenders allow a simple transfer or assignment at renewal, which can reduce legal costs. The difference can be thousands of dollars in some cases, though fees vary by province, lender, and lawyer. If you plan to switch at renewal, ask both the current lender and the new lender: Is my mortgage a collateral charge? What is the discharge fee? Will you cover legal costs? The FCAC mortgage page advises comparing the total cost of switching, not just the interest rate. A lower rate on a collateral mortgage can be outweighed by higher switching costs if you change lenders frequently.
Refinancing, HELOCs, and future borrowing
Collateral charges offer flexibility for future borrowing. If you have a collateral charge with a readvanceable feature, you may be able to borrow more as you pay down the principal, up to the registered amount. That can be useful for renovations, investments, or emergencies. A conventional charge does not usually allow readvances; you would need to refinance, which means a new approval and possibly new legal fees. However, collateral charges can also make it harder to switch lenders because of the discharge requirement. If you are considering a HELOC, a collateral mortgage may be the only way to bundle it, but you should compare the total cost of the charge structure over the expected life of your borrowing. You can estimate payments with our loan payment calculator. Also consider how a cosigner fits in; see our guide on what a co-signer is and how joint borrowing affects credit.
Cosigners and joint borrowers
If you co-sign a mortgage, the charge structure affects everyone on title and on the loan. With a collateral charge, the lender may secure not only the mortgage but also other debts of the borrower or borrowers. That means a cosigner could be exposed to more than the original mortgage amount if the borrower later uses a readvanceable feature or adds a secured product. With a conventional charge, the registered amount is usually limited to the mortgage, so the cosigner's exposure is more predictable. The FCAC provides guidance on disclosure to joint borrowers, which can help cosigners understand their rights. If you are co-signing, ask the lender to explain the maximum amount registered and whether the charge secures other products. Our page on bad credit loans also discusses how cosigning can affect credit and approval.
Common mistakes to avoid
- Assuming your mortgage is conventional because the rate is low. Many low-rate mortgages are collateral charges.
- Not asking about discharge fees before switching. A collateral charge can add legal and discharge costs.
- Signing without understanding that the charge may secure a HELOC or credit card. Ask what the maximum registered amount covers.
- Forgetting that a collateral charge may be registered for more than your loan. That can affect your ability to switch or refinance with another lender.
- Ignoring the impact on cosigners. A cosigner may be exposed to future readvances and additional secured debt.
- Assuming all provinces treat charges the same. Land title and registration rules vary by province, so check local rules and your mortgage documents.
Who this matters most for
This distinction matters most for borrowers who expect to switch lenders, refinance, or borrow more in the future. It also matters for cosigners and joint borrowers who want to understand the maximum amount secured against the home. If you plan to stay with one lender and never need a readvanceable product, the difference may be less important, but you should still know the charge type before you sign. Review your mortgage commitment and ask the lender to confirm the registered amount, the discharge process, and whether the charge secures any other debts.